Scope 3 Emissions - Aluminum

Track and calculate indirect greenhouse gas emissions from your aluminum production value chain

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Scope 3 Categories

  • Bauxite Mining 1.5M tCO₂e
  • Alumina Refining 2.1M tCO₂e
  • Anode Production 0.8M tCO₂e
  • Aluminum Smelting 3.2M tCO₂e
  • Casting & Fabrication 0.9M tCO₂e
  • Transportation & Logistics 1.1M tCO₂e
  • Raw Materials 1.4M tCO₂e
  • Energy Supply Chain 2.5M tCO₂e
  • Product End-Use 0.7M tCO₂e

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Total Scope 3

13.2M
tCO₂e
5.2% vs last year
Data Coverage
72%

Bauxite Mining

Emissions from bauxite extraction, overburden removal, and mining operations

1.5M tCO₂e Total
11% of Scope 3
78% Data Coverage

Mining Operations

Total bauxite ore extracted from mines
Soil and rock removed to access bauxite deposits
Diesel for mining equipment and haul trucks
Explosives for blasting operations

Beneficiation & Processing

Fresh water used in bauxite washing
Red mud and other mining residues
Land area undergoing rehabilitation

Alumina Refining

Emissions from Bayer process operations and alumina production

2.1M tCO₂e Total
16% of Scope 3
82% Data Coverage

Bayer Process Inputs

Sodium hydroxide for digestion process
For causticization and pH control
Steam for digestion and evaporation
Total alumina output from refining

Energy Consumption

Electrical energy for refining operations
Natural gas for calcination and heating
Fuel for alumina calcination process

By-Products & Waste

Bauxite residue from refining process
Area used for red mud disposal
Process wastewater requiring treatment

Anode Production

Emissions from carbon anode manufacturing and baking processes

0.8M tCO₂e Total
6% of Scope 3
75% Data Coverage

Raw Materials

Calcined petroleum coke for anode production
Binding agent for anode paste
Recycled anode butts for new anodes

Production Process

Total prebaked anodes manufactured
Energy for anode baking furnaces
Direct emissions from baking process

Aluminum Smelting

Emissions from Hall-Héroult electrolysis process and smelting operations

3.2M tCO₂e Total
24% of Scope 3
85% Data Coverage

Smelting Operations

Primary aluminum production
Carbon anodes consumed in smelting
Flux materials for electrolysis
Additive for bath chemistry control

Energy & Emissions

Electrical energy for electrolysis
Perfluorocarbon emissions from anode effects
Hazardous waste from cell relining

Casting & Fabrication

Emissions from aluminum casting, rolling, extrusion and fabrication processes

0.9M tCO₂e Total
7% of Scope 3
68% Data Coverage

Casting Operations

Aluminum ingots from casting house
Silicon, magnesium, copper, etc.
Energy for melting and casting

Fabrication Processes

Energy for hot and cold rolling mills
Energy for extrusion presses
Scrap generated during fabrication

Transportation & Logistics

Emissions from transportation of materials and products throughout the value chain

1.1M tCO₂e Total
8% of Scope 3
72% Data Coverage

Material Transport

Bauxite transportation from mines to refineries
Alumina transportation to smelters
Aluminum products to customers

Transport Modes

Average maritime transport distance
Rail transportation for materials
Road transportation for materials

Raw Materials

Emissions from production of chemicals and materials used in aluminum production

1.4M tCO₂e Total
11% of Scope 3
65% Data Coverage

Chemical Inputs

Sodium carbonate for various processes
Quicklime and hydrated lime
AlF₃, cryolite, and other fluorides

Refractory Materials

Refractory materials for furnaces and cells
Carbon cathode blocks for smelting cells

Energy Supply Chain

Emissions from fuel extraction, processing and electricity generation for aluminum production

2.5M tCO₂e Total
19% of Scope 3
80% Data Coverage

Electricity Generation

Electricity from coal-fired power plants
Electricity from natural gas power plants
Electricity from hydroelectric sources

Fuel Supply Chain

Extraction and processing of natural gas
Mining and processing of coal
Refining and distribution of diesel

Product End-Use

Emissions from use of aluminum products in various applications

0.7M tCO₂e Total
5% of Scope 3
45% Data Coverage

Product Applications

Aluminum used in automotive and aerospace
Aluminum for cans and packaging
Aluminum for building and construction

Use Phase Emissions

Emissions saved through lightweighting
Percentage of aluminum recycled after use